Blood Alcohol Content (BAC) Calculator

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Understanding Blood Alcohol Content (BAC)

What is BAC?

Blood Alcohol Content (BAC) measures the percentage of alcohol in your bloodstream. A BAC of 0.08% means that 0.08% of your blood volume is alcohol.

Legal Limits

In most U.S. states, the legal BAC limit for driving is 0.08%. Utah has a stricter limit of 0.05%. For drivers under 21, any detectable alcohol (0.00-0.02% depending on state) is illegal.